CVE-2025-58888 in The Flash Plugin
Summary
by MITRE • 12/18/2025
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in AncoraThemes The Flash theflash allows PHP Local File Inclusion.This issue affects The Flash: from n/a through <= 1.15.
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Analysis
by VulDB Data Team • 12/18/2025
The vulnerability identified as CVE-2025-58888 represents a critical PHP Remote File Inclusion flaw that specifically impacts the AncoraThemes The Flash theme version 1.15 and earlier. This issue stems from improper handling of filename parameters in include/require statements within the PHP application code, creating a pathway for malicious actors to execute arbitrary code on affected systems. The vulnerability falls under the broader category of insecure direct object references and improper input validation, which are commonly exploited in web application attacks.
The technical implementation of this vulnerability occurs when the theme's PHP code accepts user-supplied input directly into include or require statements without adequate sanitization or validation. This allows attackers to manipulate the filename parameter to include malicious files from remote servers or local system paths, effectively bypassing normal access controls and executing unauthorized code. The flaw specifically affects the theme's handling of file inclusion mechanisms, where the application fails to properly validate or sanitize the input before using it in dynamic include operations. This type of vulnerability is classified as CWE-98 and is directly related to the improper control of filename for include/require statements.
The operational impact of this vulnerability is severe and far-reaching for affected systems. Attackers can leverage this weakness to execute arbitrary PHP code on the target server, potentially leading to complete system compromise, data exfiltration, or the installation of backdoors. The vulnerability enables local file inclusion attacks where malicious actors can access sensitive system files, read configuration data, or inject malicious code into the web application. This represents a critical security risk that could allow attackers to gain persistent access to the affected systems and escalate privileges within the application environment. The attack surface is particularly concerning as it affects a widely used WordPress theme, potentially exposing numerous websites to exploitation.
Mitigation strategies for CVE-2025-58888 should focus on immediate patching of the affected theme version, as the vulnerability is directly related to the theme's code implementation. System administrators should ensure that all instances of the The Flash theme are updated to version 1.16 or later, which contains the necessary security fixes. Additionally, implementing proper input validation and sanitization measures in the application code can prevent similar issues in the future. Security controls should include disabling remote file inclusion capabilities in PHP configurations, implementing proper access controls, and monitoring for suspicious file inclusion patterns. Organizations should also consider implementing web application firewalls and runtime application self-protection mechanisms to detect and prevent exploitation attempts. This vulnerability aligns with attack patterns documented in the MITRE ATT&CK framework under technique T1190 for exploit public-facing application and T1059 for command and scripting interpreter, highlighting the need for comprehensive defensive measures.